[WIP] Allow scroll events to permanently change the default gesture handler in RootView

ui/views/widget/root_view_unittest.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/views/widget/root_view.h"
 
 #include "ui/views/context_menu_controller.h"
 #include "ui/views/test/views_test_base.h"
 #include "ui/views/view_targeter.h"
 #include "ui/views/widget/root_view.h"
@@ skipping 183 matching lines @@
   View* gesture_handling_child_view = new GestureHandlingView;
   gesture_handling_child_view->SetBoundsRect(gfx::Rect(10,10));
   parent_view->AddChildView(gesture_handling_child_view);
 
   View* other_child_view = new View;
   other_child_view->SetBoundsRect(gfx::Rect(20, 0, 10,10));
   parent_view->AddChildView(other_child_view);
 
   // |parent_view| should not show a context menu as a result of a long press on
   // |gesture_handling_child_view|.
-  ui::GestureEvent begin1(5, 5, 0, base::TimeDelta(),
-      ui::GestureEventDetails(ui::ET_GESTURE_BEGIN, 0, 0));
-  ui::EventDispatchDetails details = root_view->OnEventFromSource(&begin1);
-
   ui::GestureEvent long_press1(
       5,
       5,
       0,
       base::TimeDelta(),
       ui::GestureEventDetails(ui::ET_GESTURE_LONG_PRESS, 0, 0));
-  details = root_view->OnEventFromSource(&long_press1);
+  ui::EventDispatchDetails details = root_view->OnEventFromSource(&long_press1);
 
   ui::GestureEvent end1(5,
                         5,
                         0,
                         base::TimeDelta(),
                         ui::GestureEventDetails(ui::ET_GESTURE_END, 0, 0));
   details = root_view->OnEventFromSource(&end1);
 
   EXPECT_FALSE(details.target_destroyed);
   EXPECT_FALSE(details.dispatcher_destroyed);
   EXPECT_EQ(0, controller.show_context_menu_calls());
 
   // |parent_view| should show a context menu as a result of a long press on
   // |other_child_view|.
-  ui::GestureEvent begin2(25, 5, 0, base::TimeDelta(),
-      ui::GestureEventDetails(ui::ET_GESTURE_BEGIN, 0, 0));
-  details = root_view->OnEventFromSource(&begin2);
-
   ui::GestureEvent long_press2(
       25,
       5,
       0,
       base::TimeDelta(),
       ui::GestureEventDetails(ui::ET_GESTURE_LONG_PRESS, 0, 0));
   details = root_view->OnEventFromSource(&long_press2);
 
   ui::GestureEvent end2(25,
                         5,
                         0,
                         base::TimeDelta(),
                         ui::GestureEventDetails(ui::ET_GESTURE_END, 0, 0));
   details = root_view->OnEventFromSource(&end2);
 
   EXPECT_FALSE(details.target_destroyed);
   EXPECT_FALSE(details.dispatcher_destroyed);
   EXPECT_EQ(1, controller.show_context_menu_calls());
 }
 
 }  // namespace test
 }  // namespace views